Loi, Nguyen, Le Quang Dao, Dong Thu Van, Pham Lan Hoa, & Le Thanh Tung. " Study on the Frequency of Heavy Rainfall in Huong Khe District, Ha Tinh Province." VNU Journal of Science: Earth and Environmental Sciences [Online], 33.2 (2017): n. pag. Web. 22 Nov. 2024